Delayed event preview (no key)
GET/v1/cryptodata/stream/delayed
A free, keyless preview of the stream: the events from a 3-minute window that ended 30 minutes ago (`window_start`/`window_end`, event time, ms), oldest first, at most 900. `server_now` lets a client replay them at their original pace (`ts + delay_ms`). `events_per_min` is the window's rate. Cached for 60s. For real-time events use `GET /stream` (Pro).
Price
$0.01/ callEdge cache
Off
Uptime 24h
100.00%
p95
483ms
Parameters
No parameters.
Code
# 1. No key, no payment: the gateway answers 402 with the price
curl -i "https://api.realtimeapi.ai/v1/cryptodata/stream/delayed"
# 2. Pay: retry with a signed x402 payment (any x402 client builds this header)
curl "https://api.realtimeapi.ai/v1/cryptodata/stream/delayed" -H "PAYMENT-SIGNATURE: $X402_PAYMENT"// npm i @x402/fetch @x402/core @x402/evm viem
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = x402Client.fromConfig({ schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(PRIVATE_KEY)) }] });
const pay = wrapFetchWithPayment(fetch, client);
const data = await (await pay("https://api.realtimeapi.ai/v1/cryptodata/stream/delayed")).json();
console.log(data);# pip install x402 eth-account requests
from eth_account import Account
from x402.clients.requests import x402_requests
session = x402_requests(Account.from_key(PRIVATE_KEY))
print(session.get("https://api.realtimeapi.ai/v1/cryptodata/stream/delayed").json())curl "https://api.realtimeapi.ai/v1/cryptodata/stream/delayed" -H "X-API-Key: $RTAPI_KEY"Frequently asked questions
How do I get delayed event preview (no key) from CryptoDataAPI?
Send GET https://api.realtimeapi.ai/v1/cryptodata/stream/delayed. Pay $0.01 per request with x402, or send an X-API-Key header.
What does GET /stream/delayed cost?
$0.01 per successful request in USDC on Base. Failed requests are never charged.
Can I call this endpoint from an MCP client?
Yes. Connect any MCP client to the RealtimeAPI server and use call_feed with this endpoint's URL, or get_quote to check the price first.